I will chime in with the others - NOTHING gets dirt out if you physically are not pulling it out of the boat - so rent a steam cleaner with a wand attachment - I had cleaned my last year with the typical spray foam stuff - then vacumming with a shop vac. The steam cleaner I used this year, it looked like coffee coming up - color is back, carpet is much softer, stands up better. Rented mine from a grocery store like Publix